Cover plate structure, battery and battery pack

Abstract

The utility model relates to the technical field of pole packaging, especially relates to a cover plate structure, a battery and a battery pack. The cover plate structure of the utility model includes a cover plate body, and the pole and output pole block arranged on the cover plate body, the output pole block is riveted and connected with the pole, and the rivet needle hole is arranged at one end of the pole, and the cover piece is arranged in the rivet needle hole, and the cover piece at least constitutes the cover of the rivet needle hole. The cover plate structure of the utility model makes the output pole block riveted and connected with the pole, and the rivet needle hole is arranged at one end of the pole, and the cover piece that at least constitutes the cover of the rivet needle hole is arranged in the rivet needle hole, so that the rivet needle hole can be isolated from the outside electrolyte, moisture and oxygen, thereby effectively preventing the pole from oxidizing, and the overall performance of the battery is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrode packaging technology, and in particular to a cover plate structure. This utility model also relates to a battery using this cover plate structure, and a battery pack incorporating the battery. Background Technology

[0002] With the continuous maturation of lithium-ion battery technology, it has been widely used as a power battery in the field of electric vehicles. Lithium-ion batteries are composed of lithium-ion cells, and the cell cover structure is an important component of the lithium-ion cell. This structure mainly includes components such as the cover plate, terminal post riveting blocks, and insulating parts.

[0003] In battery manufacturing, riveting is typically used to connect the terminals to the output electrodes. To prevent oxidation, the terminals are usually passivated before riveting to form a protective oxide layer. However, during the riveting process, this oxide layer on the terminal surface can be damaged. After the battery is assembled and used under normal conditions for a period of time, the exposed metal surface of the terminals may undergo oxidation, leading to an increase in the battery's internal resistance and affecting its performance. Utility Model Content

[0004] In view of this, the present invention aims to propose a cover plate structure to effectively prevent electrode oxidation and improve the overall performance of the battery.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A cover plate structure is applied to a battery casing, including a cover plate body, and a terminal post and an output terminal block disposed on the cover plate body;

[0007] The output electrode block is riveted to the electrode post, and a rivet hole is provided at one end of the electrode post, and a cover is provided in the rivet hole, and the cover at least constitutes a cover for the rivet hole.

[0008] Furthermore, the cover is made of a colloid injected into the rivet hole.

[0009] Furthermore, the output electrode has a riveting hole and a recessed groove at one end of the riveting hole, the recessed groove extending radially outward along the riveting hole; the output electrode is sleeved on the outside of the electrode post through the riveting hole, and the cover is made of colloid injected into the riveting hole and the recessed groove.

[0010] Furthermore, the cover is provided with positioning holes for positioning the busbar on the pole post.

[0011] Furthermore, the pole and the output pole are welded together at the edge of the riveting hole.

[0012] Furthermore, the riveting hole includes a first part and a second part arranged sequentially along its axial direction, the inner diameter of the second part being larger than that of the first part; the second part is close to the sinker and communicates with the sinker.

[0013] Furthermore, the pole includes a plate portion and a column portion disposed at one end of the plate portion; the plate portion is disposed on one side of the cover plate body, and the column portion passes through the cover plate body and is riveted to the output pole block.

[0014] Furthermore, the cover plate structure also includes a first insulating member disposed between the output electrode block and the cover plate body, a second insulating member disposed between the plate portion and the cover plate body, and a sealing member disposed between the column portion and the cover plate body; the first insulating member includes a main body sandwiched between the output electrode block and the first insulating member, and a protrusion protruding to one side of the main body, the protrusion being disposed around the output electrode block.

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] The cover plate structure described in this utility model connects the output electrode block to the terminal post by riveting, and a rivet hole is opened at one end of the terminal post. A cover member is provided in the rivet hole to at least cover the rivet hole. In this way, the cover member can isolate the rivet hole from the external electrolyte, moisture and oxygen, thereby effectively preventing the terminal post from oxidizing and improving the overall performance of the battery.

[0017] The cover is made of a colloid injected into the pin hole. In this way, the colloid material can completely fill the pin hole area, forming a continuous and dense sealing layer, which isolates the exposed metal surface of the electrode from the external electrolyte, moisture and oxygen, thereby effectively preventing the electrode from oxidizing. At the same time, the use of colloid injection to form the cover eliminates the need for complex machining or assembly processes on the electrode and output electrode block. It is only necessary to inject the colloid into the pin hole and let it cure. The operation is simple and convenient, easy to control and automate, and can effectively improve production efficiency and reduce production costs.

[0018] The output electrode has a riveting hole and a groove located at one end of the riveting hole and extending radially outward along the riveting hole. The output electrode is fitted onto the outside of the electrode post through the riveting hole. The cover is made of colloid injected into the riveting hole and the groove. In this way, the cover is made of colloid injected into the riveting hole and the groove, which can increase the coverage area of ​​the cover, thereby effectively isolating the exposed metal surface of the electrode post and the connection gap between the riveting hole and the output electrode from the external electrolyte, moisture and oxygen, effectively preventing corrosion, oxidation and other problems, and helping to improve the output stability of the battery.

[0019] The cover is equipped with positioning holes, which are used to position the busbar on the pole. This improves the positioning accuracy of the busbar, fixes the busbar in the accurate position on the output pole block, and prevents the busbar from shifting before welding. It can effectively prevent problems such as poor welding or cold welding between the busbar and the output pole block caused by position deviation, and improve the welding quality between the busbar and the output pole block. At the same time, the positioning holes also make the installation of the busbar simpler and faster, which helps to reduce assembly time and improve production efficiency.

[0020] The terminals and output terminals are welded together at the edge of the riveting hole, thus forming a single unit that enhances the connection strength and stability. This creates a continuous metallic fusion at the connection point, effectively reducing contact resistance and minimizing energy loss during transmission. This improves battery energy transfer efficiency and ensures optimal output performance. Furthermore, the welded connection is less prone to loosening or damage during battery use, maintaining a good electrical connection over a long period. This reduces the risk of current fluctuations or interruptions due to poor connection, improving the overall electrical performance and safety of the battery.

[0021] The rivet hole includes a first part and a second part arranged sequentially along its axial direction. The second part, which is close to and communicates with the sink, can provide a larger filling space for the colloid, allowing the colloid to more fully cover the gap in the rivet hole and the sink, which is beneficial to improving the overall sealing performance of the battery.

[0022] The terminal includes a plate portion and a post portion located at one end of the plate portion. The plate portion is located on one side of the cover plate body, and the post portion passes through the cover plate body and is riveted to the output electrode block. In this way, the post portion passes through the cover plate body and is riveted to the output electrode block. This through-type connection method makes the terminal and the output electrode block tightly integrated into a whole, enhancing the connection strength and stability between the two. The riveting connection method can also effectively reduce the contact resistance between the terminal and the output electrode block, reduce the loss of electrical energy during the transmission process, improve the energy transmission efficiency of the battery, and help improve the output performance of the battery.

[0023] The cover structure includes a first insulating member disposed between the output electrode block and the cover body, a second insulating member disposed between the plate portion and the cover body, and a sealing member disposed between the post portion and the cover body. The first insulating member includes a main body sandwiched between the output electrode block and the first insulating member, and a protrusion protruding to one side of the main body. The protrusion surrounds the output electrode block. Thus, the first and second insulating members effectively isolate the output electrode block and the plate portion of the terminal from the cover body, effectively preventing current conduction to the cover body, avoiding direct contact between the user or equipment and live parts, reducing the risk of electric shock, and ensuring battery safety. The sealing member effectively prevents contact between the post portion of the terminal and the cover body, effectively preventing the cover body from becoming live, and effectively preventing leakage of electrolyte or other substances or the entry of foreign objects into the battery, which could interfere with normal battery operation, thus improving battery safety and reliability. The protrusion surrounding the output electrode block effectively prevents displacement or shaking of the output electrode block, and also improves the insulation between the output electrode block and external components.

[0024] Another objective of this invention is to provide a battery in which the casing is provided with the aforementioned cover structure.

[0025] Another objective of this invention is to provide a battery pack in which the aforementioned battery is disposed.

[0026] The battery and battery pack of this invention, along with the cover structure described above, have the same beneficial effects as the prior art, and will not be repeated here. Attached Figure Description

[0027] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0028] Figure 1 This is a schematic diagram of the overall structure of the cover plate structure according to the first embodiment of the present utility model;

[0029] Figure 2 This is an exploded view of the first embodiment of the cover plate structure described in this utility model.

[0030] Figure 3 This is a cross-sectional view of a first embodiment of the cover plate structure described in this utility model.

[0031] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0032] Figure 5This is a first embodiment of the cover described in this utility model;

[0033] Figure 6 This is a schematic diagram of the overall structure of the second embodiment of the cover plate structure described in this utility model.

[0034] Figure 7 This is an exploded view of a second embodiment of the cover plate structure described in this utility model.

[0035] Figure 8 This is a cross-sectional view of a second embodiment of the cover plate structure described in this utility model.

[0036] Figure 9 for Figure 8 A magnified view of a section at point B in the middle;

[0037] Figure 10 This is a second embodiment of the cover described in this utility model;

[0038] Figure 11 This is a schematic diagram of the pole structure described in an embodiment of the present utility model;

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Cover plate body; 11. First insulating component; 111. Main body; 112. Protrusion; 12. Second insulating component; 13. Sealing component;

[0041] 2. Output pole block; 21. Riveting hole; 211. Countersunk groove; 212. First part; 213. Second part;

[0042] 3. Pole post; 31. Plate body; 32. Post body; 33. Rivet hole;

[0043] 4. Cover; 41. Positioning hole. Detailed Implementation

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0045] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0047] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] Example 1

[0049] In current battery manufacturing processes, riveting is commonly used to connect the terminals and output electrodes. To effectively prevent terminal oxidation, the terminals are typically passivated before riveting to form a protective oxide layer. However, during the riveting process, especially in the area of ​​the rivet holes, the oxide layer on the terminal surface can be damaged due to mechanical stress or contact surface disruption. After the battery is assembled and put into normal operation for a period of time, the exposed metal surface of the terminals may undergo oxidation, leading to increased internal resistance and affecting battery performance.

[0050] In view of this, this embodiment specifically proposes a cover plate structure to effectively prevent oxidation of the electrode posts, thereby improving the overall performance of the battery. In terms of the overall structure, as follows... Figures 1 to 4 As shown, the cover plate structure includes a cover plate body 1, an electrode post 3 and an output electrode block 2 disposed on the cover plate body 1. The output electrode block 2 is riveted to the electrode post 3, and a rivet hole 33 is provided at one end of the electrode post 3. A cover member 4 is disposed in the rivet hole 33, and the cover member 4 at least covers the rivet hole 33. In this way, the cover member 4 can isolate the rivet hole 33 from the external electrolyte, moisture and oxygen, thereby effectively preventing the electrode post 3 from oxidizing and improving the overall performance of the battery.

[0051] Furthermore, in this embodiment, the rivet hole 33, as... Figure 4 As shown, its cross-section is an inverted trapezoid. It should be noted that related structures not mentioned in this embodiment, such as busbars, can be referred to from related structures well-known to those skilled in the art, and will not be described in detail here.

[0052] In this embodiment, as a preferred implementation, such as Figures 2 to 4As shown, the output electrode 2 has a riveting hole 21 and a recess 211 at one end of the riveting hole 21. The recess 211 extends radially outward along the riveting hole 21. The output electrode 2 is fitted onto the electrode post 3 through the riveting hole 21. The cover 4 is made of a gel filled in the riveting hole 33 and the recess 211. In this way, by making the cover 4 a gel filled in the riveting hole 33 and the recess 211, the coverage area of ​​the cover 4 can be increased, thereby effectively isolating the exposed metal surface of the electrode post 3 and the connection gap between the riveting hole 21 and the output electrode 2 from the external electrolyte, moisture and oxygen, effectively preventing corrosion, oxidation and other problems, and helping to improve the output stability of the battery.

[0053] In specific implementation, the colloid in this embodiment can be any colloid well known to those skilled in the art, such as fluororubber sealant, epoxy resin sealant, polysulfide sealant, etc. Any sealant that can achieve the above effects can be used.

[0054] In this embodiment, as a preferred implementation, such as Figures 2 to 5 As shown, the cover 4 is provided with positioning holes 41, which are used to position the busbar on the pole post 3. This setting can improve the positioning accuracy of the busbar, fix the busbar in the accurate position on the output pole block 2, avoid the busbar from shifting, and effectively prevent problems such as poor welding or cold welding between the busbar and the output pole block 2 caused by position deviation, thereby improving the welding quality between the busbar and the output pole block 2. The positioning holes 41 can also make the installation of the busbar simpler and faster, which helps to reduce assembly time and improve production efficiency.

[0055] In this embodiment, as a preferred implementation, such as Figure 3 Right now Figure 4 As shown, the terminal 3 and the output electrode 2 are welded together at the edge of the riveting hole 21. The advantage of this arrangement is that it allows the terminal 3 and the output electrode 2 to form a single unit, enhancing the connection strength and stability between them. It also creates a continuous metal fusion at the connection point, effectively reducing the contact resistance between the terminal 3 and the output electrode 2. This reduces energy loss during transmission, improves the battery's energy transfer efficiency, and helps ensure the battery's output performance.

[0056] In addition, welded connections are less prone to loosening or damage during battery use, maintaining a good electrical connection over a long period of time, reducing the risk of current fluctuations or interruptions caused by poor connections, and improving the overall electrical performance and safety of the battery.

[0057] Furthermore, the welding process in this embodiment is preferably laser welding. This enables high-precision positioning and welding, ensuring accurate weld point placement. For welding the pole 3 and the output electrode 2 at the edge of the riveting hole 21, the weld point can be precisely placed in the designated position, improving the stability of welding quality. Moreover, laser welding is a localized heating method, heating only the welding area, resulting in a small heat-affected zone. Therefore, the surface quality of the pole 3 and the output electrode 2 is better after welding, reducing the workload of post-weld cleaning and processing, improving production efficiency, and also helping to ensure the appearance quality and dimensional accuracy of the welded parts.

[0058] In this embodiment, as a preferred implementation, the following continues... Figure 3 Right now Figure 4 As shown, the riveting hole 21 includes a first part 212 and a second part 213 arranged sequentially along its axial direction. The inner diameter of the second part 213 is larger than that of the first part 212. The second part 213 is close to and communicates with the recess 211. This arrangement allows the second part 213, which is close to and communicates with the recess 211, to provide a larger filling space for the colloid, enabling the colloid to more fully cover the gap between the riveting hole 21 and the recess 211, thus improving the overall sealing performance of the battery.

[0059] In this embodiment, as a preferred implementation, such as Figure 11 As shown, the terminal post 3 includes a plate portion 31 and a column portion 32 located at one end of the plate portion 31. The plate portion 31 is located on one side of the cover plate body 1, and the column portion 32 passes through the cover plate body 1 and is riveted to the output electrode block 2. This configuration, where the column portion 32 passes through the cover plate body 1 and is riveted to the output electrode block 2, ensures a tight connection between the terminal post 3 and the output electrode block 2, enhancing the connection strength and stability. The riveting connection also effectively reduces the contact resistance between the terminal post 3 and the output electrode block 2, minimizing energy loss during transmission, improving the battery's energy transfer efficiency, and ultimately enhancing the battery's output performance. When the cover plate structure is applied to the battery casing, the plate portion 31 is typically located inside the battery casing.

[0060] In this embodiment, as a preferred implementation, such as Figures 2 to 4 As shown, the cover plate structure also includes a first insulating member 11 disposed between the output electrode block 2 and the cover plate body 1, a second insulating member 12 disposed between the plate body portion 31 and the cover plate body 1, and a sealing member 13 disposed between the column portion 32 and the cover plate body 1. The first insulating member 11 includes a main body 111 sandwiched between the output electrode block 2 and the first insulating member 11, and a protrusion 112 protruding to one side of the main body 111. The protrusion 112 is arranged around the output electrode block 2.

[0061] This configuration effectively isolates the output electrode 2 and the plate portion 31 of the terminal post 3 from the cover plate body 1, preventing current conduction to the cover plate body 1 and avoiding direct contact between the user or equipment and live components, thus reducing the risk of electric shock and ensuring battery safety. The sealing element 13 effectively prevents contact between the post portion 32 of the terminal post 3 and the cover plate body 1, preventing the cover plate body 1 from becoming live, and also prevents leakage of electrolyte or other substances or the entry of foreign objects into the battery, thus improving battery safety and reliability. The protrusion 112 surrounding the output electrode 2 provides support and positioning, while also improving insulation between the output electrode 2 and external components.

[0062] Furthermore, in this embodiment, as Figure 4 As shown, the first insulating member 11 mainly serves to insulate the output electrode 2 from the cover plate body 1. Specifically, the first insulating member 11 has a clearance hole corresponding to the electrode post 3, and the clearance hole penetrates the first insulating member 11. Additionally, the first insulating member 11 has a protrusion extending towards one side of the cover plate body 1, and the protrusion is arranged circumferentially along the clearance hole. Simultaneously, corresponding to the protrusion, one end of the cover plate body 1 has a recessed groove into which the protrusion is inserted. This not only positions the first insulating member 11 but also further improves the insulation effect between the electrode 2 and the cover plate body 1. Furthermore, the second insulating member 12 is attached to the cover plate body 1 and has a groove adapted to the plate portion 31 of the electrode post 3. The plate portion 31 of the electrode post 3 is embedded in this groove, thereby improving the stability of the second insulating member 12 and further enhancing the insulation effect between the electrode post 3 and the cover plate body 1.

[0063] It should be noted that in this embodiment, two pole posts 3 are provided in the cover plate structure. Of course, it is not limited to this; only one pole post 3 may be provided, and the pole post 3 is equipped with the aforementioned covering member 4, etc. In addition, the sealing member 13 in this embodiment is a conventional structure and will not be described in detail here.

[0064] In this embodiment, during assembly, the sealing element 13 is first fitted onto the cylindrical portion 32 of the pole post 3. Then, the second insulating element 12, the cover plate body 1, and the first insulating element 11 are sequentially fitted onto the cylindrical portion 32 of the pole post 3. Next, the riveting hole 21 on the output pole block 2 is aligned with the pole post 3 and fitted onto it, then riveted together.

[0065] After riveting, to reduce the battery's internal resistance, laser welding is used to weld the terminal post 3 to the output electrode 2 at the edge of the riveting hole 21. However, the riveting and welding processes damage the passivation layer on the surface of the terminal post 3. To effectively prevent oxidation of the terminal post 3 during subsequent use, a gel material is injected into the riveting hole 33 and the sink 211. After the gel solidifies, a cover 4 is formed, isolating the riveting hole 33 from the external electrolyte, moisture, and oxygen, thereby effectively preventing oxidation of the terminal post 3 and ensuring the performance and lifespan of the battery cover.

[0066] In this embodiment, the cover plate structure connects the output electrode block 2 to the electrode post 3 by riveting them together. A rivet hole 33 is opened at one end of the electrode post 3, and a cover 4 is provided in the rivet hole 33 to cover the rivet hole 33. In this way, the cover 4 can isolate the rivet hole 33 from the external electrolyte, moisture and oxygen, thereby effectively preventing the electrode post 3 from oxidizing and improving the overall performance of the battery.

[0067] Example 2

[0068] This embodiment relates to an exemplary structure of a cover plate structure, such as... Figures 6 to 10 As shown, its overall structure is the same as in Embodiment 1, except that the cover 4 is made of a colloid injected into the pin hole 33. With this configuration, the colloid material can completely fill the area of ​​the pin hole 33, forming a continuous and dense sealing layer that isolates the exposed metal surface of the electrode post 3 from external electrolytes, moisture, and oxygen, thereby effectively preventing oxidation of the electrode post 3. Furthermore, by only placing the colloid material inside the pin hole 33, the amount of colloid material used can be reduced while ensuring the anti-oxidation effect, which is beneficial to both environmental protection and reducing production costs.

[0069] Furthermore, by using a colloid injection method to form the cover 4, there is no need for complex machining or assembly processes on the pole post 3 and the output pole block 2. The colloid can simply be injected into the rivet hole 33 and allowed to cure. The operation is simple and convenient, easy to control and automate, which can effectively improve production efficiency and further reduce production costs.

[0070] Related structures not mentioned in this embodiment, such as pole 3, output pole 2, and related advantages, can all refer to the related structures in Embodiment 1, and will not be described again.

[0071] Example 3

[0072] This embodiment relates to a battery, the battery casing of which is provided with the cover plate structure as described in Embodiments 1 and 2. By providing the cover plate structure as described in Embodiments 1 and 2 on the battery casing, the battery of this embodiment enhances the oxidation resistance at the connection between the terminal post 3 and the output electrode 2, ensuring the connection stability between the terminal post 3 and the output electrode 2. This avoids problems such as poor connection and increased internal resistance of the battery caused by oxidation of the terminal post 3, thus improving the battery's lifespan and overall performance.

[0073] Furthermore, this embodiment also relates to a battery pack, which contains the battery as described above. The battery pack of this embodiment, by employing the battery as described above, possesses all the beneficial effects of the battery as described above, and therefore will not be described in detail further.

[0074] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cover plate structure applied to a battery casing, characterized in that: It includes a cover plate body, and pole posts and output pole blocks disposed on the cover plate body; The output electrode block is riveted to the electrode post, and a rivet hole is provided at one end of the electrode post, and a cover is provided in the rivet hole, and the cover at least constitutes a cover for the rivet hole.

2. The cover plate structure according to claim 1, characterized in that: The cover is made of a colloid injected into the rivet hole.

3. The cover plate structure according to claim 1, characterized in that: The output electrode block has a riveting hole and a countersunk groove at one end of the riveting hole, the countersunk groove extending outward along the radial direction of the riveting hole. The output electrode block is sleeved on the outside of the electrode post through the riveting hole, and the cover is made of colloid injected into the rivet hole and the groove.

4. The cover plate structure according to claim 3, characterized in that: The cover is provided with positioning holes, which are used to position the busbar on the pole post.

5. The cover plate structure according to claim 3, characterized in that: The pole and the output pole are welded together at the edge of the rivet hole.

6. The cover plate structure according to claim 3, characterized in that: The riveting hole includes a first part and a second part arranged sequentially along its axial direction, wherein the inner diameter of the second part is larger than that of the first part. The second part is close to and in communication with the settling tank.

7. The cover plate structure according to any one of claims 1 to 6, characterized in that: The pole includes a plate portion and a column portion disposed at one end of the plate portion; The plate portion is located on one side of the cover plate body, and the column portion passes through the cover plate body and is riveted to the output electrode block.

8. The cover plate structure according to claim 7, characterized in that: The cover plate structure further includes a first insulating member disposed between the output electrode block and the cover plate body, a second insulating member disposed between the plate portion and the cover plate body, and a sealing member disposed between the column portion and the cover plate body; The first insulating member includes a body sandwiched between the output electrode block and the first insulating member, and a protrusion protruding to one side of the body, the protrusion being disposed around the output electrode block.

9. A battery, characterized in that: The battery casing is provided with a cover plate structure as described in any one of claims 1 to 8.

10. A battery pack, characterized in that: The battery pack is provided with the battery as described in claim 9.

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